Papers by Aldo Laurentini
Affiliation: 1. CRF, Advance Product Development, Strada Torino 50, Orbassano, 10043 Totino, Ital... more Affiliation: 1. CRF, Advance Product Development, Strada Torino 50, Orbassano, 10043 Totino, Italy, Tel (39-011) 9083071, Fax: (39-011) 9083083, e-mail: l.andreone@crf.it 2.ICCS/NTUA, Microwaves and Optics Lab, 9 Iroon Politechniou str., 15773 Zografou, ...
Electronics Letters, Feb 1, 1976
1992 Proceedings 11th Iapr International Conference on Pattern Recognition, Oct 3, 1992
ABSTRACT The visual hull of a 3-D object is a new geometric tool for dealing with concave object ... more ABSTRACT The visual hull of a 3-D object is a new geometric tool for dealing with concave object recognition or reconstruction using silhouettes. Two equivalent definitions of the visual hull of an object S can be given: (i) the maximal object silhouette-equivalent to S (that gives the same silhouettes as S); (ii) the closest approximation of S that can be obtained with volume intersection techniques. The paper addresses the problem of computing the visual hull of solids of revolution. An algorithm for this purpose is presented and its complexity analyzed. The algorithm operates in an axial plane of S dissected by straight lines and hyperbolae
Proceedings of the 8th Canadian Conference on Computational Geometry, 1996
Pattern Recognition Letters, Jan 31, 1995
Aspect graphs (AGs) have been proposed as viewer centered representations of 3D objects, suitable... more Aspect graphs (AGs) have been proposed as viewer centered representations of 3D objects, suitable for recognizing objects from single or multiple views. Many algorithms for computing the AGs of various categories of objects have been presented; however, very few AG-based recognition applications have been developed. One reason for the limited practical use of AGs is the impressive growth of the information stored as the complexity of the object increases. This may imply comparing the views of the unknown object with a very high number of stored views, and therefore a time-consuming recognition process. The purpose of this paper is to introduce a new kind of aspect graph representation, the reduced aspect graph (RAG). RAGs are suitable for topological object recognition from single or multiple views, and require less information to be stored. Therefore, the matching process is shortened.
Calcolo, 1969
A. L~UREN~'I~I (a)
Seventh International Symposium on Signal Processing and Its Applications 2003 Proceedings, Jul 1, 2003
ABSTRACT In several practical situations the only available information for recognizing or recons... more ABSTRACT In several practical situations the only available information for recognizing or reconstructing 3D objects are the object contours. Some recent theoretical developments put on a firm ground understanding 3D shapes from silhouettes. In this paper we present survey of these developments, related to the geometric concept of visual hull.
The Visual Computer, 1999
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Papers by Aldo Laurentini